23221000020 has 24 divisors (see below), whose sum is σ = 65018800224. Its totient is φ = 6192266656.

The previous prime is 23221000001. The next prime is 23221000021. The reversal of 23221000020 is 2000012232.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221000021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193508274 + ... + 193508393.

It is an arithmetic number, because the mean of its divisors is an integer number (2709116676).

Almost surely, 2^23221000020 is an apocalyptic number.

23221000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221000020 is an abundant number, since it is smaller than the sum of its proper divisors (41797800204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23221000020 is a wasteful number, since it uses less digits than its factorization.

23221000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387016679 (or 387016677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 23221000020 its reverse (2000012232), we get a palindrome (25221012252).

The spelling of 23221000020 in words is "twenty-three billion, two hundred twenty-one million, twenty", and thus it is an aban number.